DUAL ENERGY X-RAY ABSORPTIOMETRY (DXA)

Question 1

On a DXA scan, what will the presence of osteophytes do to test results?

Answer 1

May falsely overestimate BMD

Question 2

What are the 2 most predictive sites form hip fracture?

Answer 2

The HIP & CALCANEUS

Question 3

Diference between pts BMD & young-adult population. (most relevant in predicting fracture risk)

Answer 3

T-score

Question 4

What is the T-score used for?

Answer 4

Diagnosis of osteoporosis, estimation of fracture risk, determine therapy

Question 5

Each S.D. drop in BMD below young-adult mean = what?

Answer 5

2 X increased risk of fracture

Question 6

Age-matched comparison

Answer 6

Z-score

Question 7

What do the WHO osteoporosis definitions determine?

Answer 7

Determine the thresholds for elevated fracture risk, NOT designed to diagnose disease.

Question 8

What are the clinical indications for DXA scans?

Answer 8

RADIOGRAPHIC OSTEOPENIA

Question 9

If you’re patient shows generalized osteopenia on plain film, what test must you order?

Answer 9

DXA scan to determine osteoporosis